311230513 has 6 divisors (see below), whose sum is σ = 342096482. Its totient is φ = 282936720.

The previous prime is 311230511. The next prime is 311230531. The reversal of 311230513 is 315032113.

It can be written as a sum of positive squares in only one way, i.e., 246395809 + 64834704 = 15697^2 + 8052^2 .

It is not a de Polignac number, because 311230513 - 2¹ = 311230511 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (311230511) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1285956 + ... + 1286197.

Almost surely, 2^311230513 is an apocalyptic number.

It is an amenable number.

311230513 is a deficient number, since it is larger than the sum of its proper divisors (30865969).

311230513 is a wasteful number, since it uses less digits than its factorization.

311230513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2572175 (or 2572164 counting only the distinct ones).

The product of its (nonzero) digits is 270, while the sum is 19.

The square root of 311230513 is about 17641.7264744696. The cubic root of 311230513 is about 677.6842455832.

Adding to 311230513 its reverse (315032113), we get a palindrome (626262626).

The spelling of 311230513 in words is "three hundred eleven million, two hundred thirty thousand, five hundred thirteen".